Every Form 4 that Nuveen Municipal High Income Opportunity Fund (NMZ) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow NMZ and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full NMZ filings page.
Nuveen Municipal High Income Opportunity Fund common stock saw offsetting indirect trades on August 4, 2026 by reporting persons Bank of America Corporation and its wholly owned subsidiary Merrill Lynch, Pierce, Fenner & Smith Incorporated.
Merrill Lynch executed three 1-share purchases at per-share prices between $10.1750 and $10.1887 and three 1-share sales between $10.2301 and $10.3237. The reporting persons disclaim beneficial ownership except to any pecuniary interest and do not concede greater-than-10% beneficial owner or group status; any profit potentially recoverable under Section 16(b) will be remitted to the fund.
Bank of America Corporation and its subsidiary Merrill Lynch, as joint reporting persons, disclosed small, offsetting trades in NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND common stock. On 2026-08-03 and 2026-07-31 they indirectly purchased 36 shares and sold 36 shares at per-share prices between $10.1950 and $10.3250. They describe their interest as indirect, disclaim beneficial ownership beyond any pecuniary interest, and state that any potentially recoverable short-swing profit from these trades will be remitted to the fund.
Bank of America Corporation and its subsidiary Merrill Lynch, Pierce, Fenner & Smith Incorporated jointly report indirect trades in NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND common stock on 2026-07-24, purchasing 9 shares at $10.235 and selling 9 shares at $10.175. The positions are held indirectly through Merrill Lynch, with both reporting persons disclaiming beneficial ownership except for any pecuniary interest and not conceding greater-than-10% beneficial-owner status or group status. They state that any profit potentially recoverable as short-swing profit under Section 16(b), if they were deemed greater-than-10% owners, will be remitted to the issuer.
Nuveen Municipal High Income Opportunity Fund trustee Albin F. Moschner reported open-market sales of its Common Stock. On June 22, 2026, he sold 1,100 shares at $10.354 per share through a family LLC, leaving 736 indirectly held shares, and sold 1,812 shares at $10.37 per share directly, leaving 3,788 directly held shares.
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND reported an insider restructuring involving its preferred shares. In connection with the reorganization of two Nuveen municipal funds into this fund, Wells Fargo Municipal Capital Strategies, LLC exchanged 4,504 Variable Rate Demand Preferred Shares of the target funds for an equal number of the fund’s Variable Rate Demand Preferred Shares in a cashless transaction.
The filing shows these 4,504 preferred shares as indirectly beneficially owned by Capital Strategies, which is a wholly owned subsidiary of Wells Fargo & Company, giving Wells Fargo an indirect interest in the same number of preferred shares.
Nuveen Municipal High Income Opportunity Fund vice president William A. Siffermann reported an open-market purchase of common shares. On March 5, 2026, he bought 100 shares at an average price of $10.4785 per share. Following this transaction, his directly owned stake increased to 913.9717 shares of the fund’s common stock.
Bank of America Corporation and its subsidiary Merrill Lynch, Pierce, Fenner & Smith Incorporated reported transactions in common shares of Nuveen Municipal High Income Opportunity Fund (NMZ) as indirect beneficial owners. On 12/19/2025, they reported buying 1,000 NMZ common shares at a price of $10.3191 per share and selling 1,000 NMZ common shares at a price of $10.54 per share, leaving them with 0 shares beneficially owned after the reported sale. The filing states that Bank of America’s interest is indirect through its 100% ownership of Merrill Lynch, and both reporting persons disclaim beneficial ownership beyond any pecuniary interest. They also state that, without conceding greater-than-10% owner status or Section 16 applicability, any profit potentially recoverable under Section 16(b) from these transactions will be remitted to the fund.